A 19-year-old was stabbed Tuesday afternoon in front of a state Department of Mental Health home where he lives.

The stabbing occurred at around 12:15 p.m. in front of 16 Belair St., a two-family brown clapboard house off Route 27 near the south end of D>W> Field Park. Police said he was taken by helicopter to Boston with life-threatening injuries.

The man lives at the Belair Street home, according to police. Police are looking for a man who reportedly lives at the home in connection with the stabbing.